Revert "Update the best block when best proposal header is updated"

This reverts commit e6c6f95.

Author: majecty

core/src/client/importer.rs

@@ -318,7 +318,6 @@ impl Importer {
         _importer_lock: &MutexGuard<()>,
     ) -> usize {
         let prev_best_proposal_header_hash = client.block_chain().best_proposal_header().hash();
-        let prev_best_block_hash = client.block_chain().best_block_hash();
 
         let mut bad = HashSet::new();
         let mut imported = Vec::new();
@@ -351,8 +350,7 @@ impl Importer {
         self.header_queue.mark_as_bad(&bad.drain().collect::<Vec<_>>());
         let (enacted, retracted) = self.calculate_enacted_retracted(&routes);
 
-        let new_best_proposal_header = client.block_chain().best_proposal_header();
-        let new_best_proposal_header_hash = new_best_proposal_header.hash();
+        let new_best_proposal_header_hash = client.block_chain().best_proposal_header().hash();
         let best_proposal_header_changed = if prev_best_proposal_header_hash != new_best_proposal_header_hash {
             Some(new_best_proposal_header_hash)
         } else {
@@ -369,14 +367,6 @@ impl Importer {
             best_proposal_header_changed,
         );
 
-        let maybe_new_best_block_hash = new_best_proposal_header.parent_hash();
-        if best_proposal_header_changed.is_some()
-            && prev_best_block_hash != maybe_new_best_block_hash
-            && client.block(&BlockId::Hash(maybe_new_best_block_hash)).is_some()
-        {
-            client.update_best_as_committed(maybe_new_best_block_hash);
-        }
-
         client.db().flush().expect("DB flush failed.");
 
         imported.len()